<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .notification {
          display: flex;
          justify-content: space-between;
          border: 1px solid #555;
          padding: 20px;
          border-radius: 10px;
        }
        .content {
          flex: 1;
          flex-wrap: wrap;
          margin-right: 10px;
        }
      </style>
</head>
<body>
    <div class="notification">
        <div class="content">......</div>
        <span class="close-button">X</span>
      </div>
</body>
</html>